[InputFile] Add OnFileCountExceeded callback

[rpodevns]

Pull Request

📖 Description

Add event callback to handle cases where the uploaded file count exceeds the specified maximum limit.

🎫 Issues

Fix #3204

👩‍💻 Reviewer Notes

Is the name OnFileCountExceeded acceptable, or would you prefer a different one?

📑 Test Plan

✅ Checklist

General

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have added Unit Tests for my new component
• I have modified an existing component
• I have validated the Unit Tests for an existing component

⏭ Next Steps